Take her outside

"This way!" You say, grabbing her arms away from her chest and leading her out a fire exit towards the car park.

"Great, is your car out here?" She asks, taking her arms back to cover up again.

"No, I don't have a car, where's yours?" You tell her

"I don't have a car!" She yells.

"Well you should have thought about that before you ran outside to the car park."

"You lead me out here!" She says, pointing, so angry that she's forgetting to cover her naked body.

"Well would you rather be in there with a hall full of people?" You ask.

"No, I guess not." She says, calming down, "But what are we going to do now?"